Printing knowledge

Maintenance of printing rollers

    1, loading and unloading roller axis during the installation works with bearings to ensure a certain degree of precision and cleanliness, ran away with the care, not be bumping heads and adhesive layer, adhesive layer so as not to cause injury rollers, bending and breakage.

    2, lubricating gel rollers, bearing should always be effective lubrication. Poor lubrication can cause rubber roller head, bearing wear, gap increases, as well as causing uneven printing ink. Also COTS beats and sliding caused by malnutrition such as printing staves. Such as long hours of continuous operation without efficient lubrication, also will cause the bearings and shaft heat, caused two rubber rollers rubber surface thermal expansion and wear, to make two glue surfaces have a Matt surface, glue, cracking.

    3, debug, cots and cot and pressure between the plates according to the rubber elasticity, hardness and its role in adjusting during the printing process, General O.15~O.20mm feeler gauges (feeler gauges to lubricate, so as not to damage the rubber surface) testing roller radial contact pressures must be uniform. Or running for a long time will create pressure on the large rubber roller on the end of Ma, glue, crack, glue and other phenomena.

    use and maintenance ★

    1, before printing checks between the roller and the roller is free of foreign matter, cots are intact, uniform pressure between rolls, known, washed clean before they can be printed.

    2, printing rollers at work should always be kept in good contact, even by force. Regardless of the printed matter site width to narrow, to make the entire adhesive surface of the roller ink oil; depending on the COTS product how much ink, should adjust the ink volume to ensure printing quality. In the context of ensuring the printing speed, in order to prevent ink dried too quickly, roller viscosity lower crust on the surface, the ink drying oils need to be added should be control of drying oil quantity to prevent run on cots in ink and ink inequality.

    3, after printing roll and roll and roll and block disengagement, remove the load pressure, caused by static pressure to prevent plastic deformation. Cleaning roller surface residual ink in a timely manner, and prevent dry ink blocks, ink, ink, excrement and dirt floating on the rubber surface (especially nylon roll ends ink block) operation will be run over again damaged rubber surface finish, serious would have pitted dregs.

    4, rubber roller to clean rubber rollers in printing before and after the special washing agent will clean the rollers shall be made, to keep the rollers surface smooth, set aside. Not cleaned in time, ink through the roller surface fuzz-shaped cellular adhesion in micro-hole, paper, dirt on the roller surface. If the parking time is too long, conjunctiva causes two roller contact surface adhesion of ink and torn rubber face while driving, making COTS scrap. Cleaning in place, the glazing phenomenon will occur, resulting in less ink and ink, or even dip. Glazing rubber roller surface hardness, elasticity, and accelerates the wear of rollers and cause pitting, cracking at the adhesive surface, resulting in falling, affect the print quality.

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